The Cosmos HI Large Extragalactic Survey (CHILES) is a 1000h survey being carried out on the Jansky Very Large Array in Socorro, New Mexico.  This project is expected to yield the most distant detections of HI in emission ever made, and forms a vital pathfinder survey for observations in the Square Kilometre Array era.  Initial processing of data from the telescope is carried out by the northern hemisphere team, with final transformation of the data into image cubes lead by the team here in Perth.